They could just improve the page count. If Spelljammer had been like 16 pages more for each book, it would have been just fine.I mean... maybe they could innovate and print it all in tiny, tiny font? And then sell an official reading device add-on?
I mean, losers could always just use their own magnifier to read it. But truly discriminating consumers of the under-monetized D&D lifestyle brand would never consider that. Instead, they would purchase an official Elminster's Embiggening Eyeglass for only $19.99.